Rhaetic fossil

[DE&i]

Collected in 1994 in Cropwell Bishop Nottinghamshire UK, some Rhaetic pyrite layer pieces from a Gypsum mine. Packed full of bivalves, fish teeth and coprolites. Focusing on this particular find, would anyone know what it may be (1st picture) 1mm scale. 

Edited March 5, 2020 by DE&i
Additional information

[Pterygotus]

Looks like a fish scale. I’ve seen (and found) many like this from Aust Cliff.

[DE&i]

4 hours ago, Pterygotus said:

Looks like a fish scale. I’ve seen (and found) many like this from Aust Cliff.

Certainly has that distinctive shape, would you have an example for comparison purposes. 

[Pterygotus]

8 hours ago, DE&i said:

Certainly has that distinctive shape, would you have an example for comparison purposes. 

I’ll get one from my collection today.

[Pterygotus]

9 hours ago, DE&i said:

Certainly has that distinctive shape, would you have an example for comparison purposes. 

Here